Apparatus for electrical precipitation of suspended particles from gases



May 27, 1924. 1,495,363

C. H. WEISKOPF APPARATUS FOR ELECTRICAL PRECIPITATION OF SUSPENDED PARTICLES FROM GASES Filed Dec. 8. 1920 2 Sheets-Sheet 1 I. 1/ 7 Fig.2

ATTORNEY May 27 1924.

C. H. WEISKOPF APPARATUS FOR ELECTRICAL PRECIPITATION OF SUSPENDED PARTICLES FROM GASES 8, 1920 2 SheetsSheet 2 Filed Dec.

2 MW N 1%.0m H S b F h w CY 7 7 y 0 W ATTORNEY Patented ay 27, 19241.

CHARLES H. wnrsxorn, or SANTA MONICA, CALIFORNIA, ASSIGNOR 'ro INTERNA- TION'AL PRECIPITATION COMPANY, or LOS ANGELES, CALIFORNIA, A CORPORA- TION OF CALIFORNIA.

APPARATUS FOR ELECTRICAL PRECIPITATION OF SUSPENDED PARTICLES FROM GASES. i

Application filedDecember 8, 1920; Serial No. 429,258.

To all whom it may concern. 7

Be it known that L'CHARLES H..VVEIS- KorF, a citizen of the United States, residing at Santa Monica, geles and State of Californian-have invented a new and useful Apparatus for Electrical Precipitation of Suspended Particles from Qrases, of which the following is a specification.

This invention relates to the art of electrical precipitation of suspended material from gases. Electrical precipitators as generally constructed comprise discharge electrodes and collecting electrodes in opposed relation and maintained at high potential difference, the collecting electrodes generally be ng grounded and the discharge electrodes being insulated and maintained at high potential and so constructed as ot provide for electrical discharge therefrom.

The main object of the invention isto provide such an apparatus with improved electrode means of such construction that the electrodes themselves may operate as jarring devices for cleaning the electrodes.

A furtherv object of my invention is to provide for utilizing the collecting electrodes as means for jarring the discharge electrodes, the collecting electrodes being movably mounted so that by moving the same from-time to time they'may be brought suddenly against a fixed arresting means to jar the collected material from the collecting electrodes, or may be'brought 'suddenly' against the discharge electrodes to jar'the sameand remove collected material therefrom. i I

The accompanying drawings illustrate embodiments ofmy invention, and referring thereto:

- Fi 1 is a longitudinal section of an electricafprecipitator of the horizontal flue type provided with my improved electrode means, the collecting electrodes being mounted to move on horizontal axes; 1

Fig. 2 is a vertical section on line 22 in Fig.1;

Fig. 3 is a plan view of another formof the invention with a part of the top removed, the collecting electrodes in this form of the invention being mounted to move on vertical axes;

in the county of Los All- Fig. 4 is a vertical section on line 44 in Fig. 5 is a longitudinal section of another form of the invention in which the collecting electrodes are mounted in balanced relation on horizontal axes;

Fig.6 is a vertical section on line 6-6 in Fig. 5;-

Fig. 7 is a plan view, partly in horizontal section, of a form of the invention in which the collecting electrodes are mounted in balanced relation on vertical axes;

Fi 8 is a vertical section on line 8 8 in Fig 7;

Fig. 9 is a vertical section showing another modification.

1 The form of the invention shown in Figs.

1 and 2 comprise a horizontal flue or chamber 1 through which the gases are passed longitudinally by any suitable connections to receive and discharge the gases from said flue of chamber, said flue or chamber being provided, if desired, with suitable means, such as bins 2, at the bottom of the flue or chamber for receiving the collected material.

The collecting electrodes in this form of the invention consist of vertical plates 3 mounted within said flue or chamber 1 on horizontal shafts or rods 4, which are mounted to turn in bearings 5 on standards, as shown at 6 in Fig. 1, which shows only one end of the precipit'a'tor; it being understood -that standards similar to the standards 6 shown are provided at the other ends of the shafts 5 for supporting the same. Each plate 3 normally hangs vertically from its supporting shaft 4; and the several plates 3, which jare mounted on the same standard, normally extend in the same vertical plane so as to form in effect an approximately continuous vertical surface member constituting a. collecting electrode, the several collecting'electrodes'so formed being spaced apart to form horizontal passages between them through which the gas flows the said electrode -members in normal position extending parallel to the flow of the gases through the flue or chamber 1 so that the gases pass between and parallel to the electrodes. The discharge electrodes 7 may-consist of wires, rods-or tubes extending within the flue or chamber 1, between and in opposed relation to the collectingelectrodes above described. 'Said discharge electrodes ed by wire 16 nacegases,

may extend in any direction parallel to the general surface of the collecting electrodes but they are herein shown extending horizontally, being mounted at their ends on vertical frame bars 8, which are hung from cross-frame bars 9 mounted on insulators 10 in an insulator box 11, only one of such cross-frame bars and insulator boxes being herein shown it being understood that the other ends of the discharge electrodes will be similarly supported. 0

Means are provided for operating the collecting electrode plates 3 so as to cause themv to turn on horizontal axes. For this purpose, the supporting shafts 4 for said plates may be provided with arms 12 pivotally con.- nected to vertical bars 13 which extend outside of the precipitator casing and are provided with suitable means for manual or mechanical operation thereof, an operating cam 15 being, for example, provided to lift the bars 13 automatically at definite intervals to cause the shafts 4 to turn in such manner as to swing the collecting electrode plates 3 1aterally towards the discharge electrodes and then allow them to drop, so that vthey are returned under gravity to vertical position. Each collecting electrode plate 3 is preferably provided with a lug or flange means 14-adapted to engage the shaft 4 of the next underlying plate, or, in the case of the lowermost plate, to engage a stationaryrod 17 to jar the said plate as it returns to normal vertical position. The plate members. 3 spaced and constructed that when they are raised in this manner they will strike the opposed discharge electrodes 7, it being understood that provlsion is made for turning oit the high potential current supply to the discharge electrodes when this operation is taking place.

The discharge electrode system is connectto. any suitable high tension electrical circuit, preferably uni-directional,

Cottrell, No. 895,729, August 11th, 1908.

The operation otthis form of the invention-is as follows: i i

' The gas to be treated, which may be furor other gases carrying dust or fume, passes through due 1 and is subjected to the action of the electrical field main tained between the discharge electrodes 7 and the collecting electrode members 3,

with the result that the dust or fume is collected on the electrodes. From time to time the current supply from the high tension circuit is shut off andthe electrode members-3 are operated by the automatic means 15, or manually, as may be preferred,

to move or sw ng sald members 3 upwardly the action of are preferably so G, other when returned to such position.

trode plates.

aeaaee 3 return to normal position under the action of gravity the flanges 14 thereon strike the arresting members or stop means 4 or 17 and cause jarring of the collecting electrodes, and the jarring thus produced in the operation and return movements of the collecting electrode members 3 causes the material collectcd thereon to be shaken loose or dislodged. The material recovered from the collecting and discharge electrodes, as above described. falls by gravity to the bins 2 from which it may be withdrawn as required. A

As shown in Figs. 3 and 4, the shafts 4' of the collecting electrode members may extend vertically and be mounted to turn in 1 frame bars 18 and 19 and may be operated positively in both operating and return movements, for example, by handle means 21 on one of the vertical shafts 4 said shafts being connected to move in unison by bars 13' connected to arms 12 on construction and operation being otherwise as above described. This form of the invention has the advantage that in the cleaning operation the pivoted electrode members are swung to positions in which they extend transversely to the How of gases through the precipitator, thereby slowing downthe gas stream and rendering the cleaning more effective, there being less tendency for the dislodged material to with the gas stream.

Instead of forming the collecting members as wings or plates extending in one direction only from the supporting shafts, the collecting electrodes may, as shown in Figs. Sand 6. be formed as plates or wings 23 extending both above and below-the horizontal shafts 4carrying the same so as to balance the weight, these plates overlapping, as shown, when in vertical position so as to jar one apn this case the plates 23 may be returned to normal position by the Weight of the operating bars 13. A similar double plate or -wing constructionmay be used in conjunction with a vertical shaft connection, as lllustrated in Figs. 7 and 8, the platesbeing balanced on vertical shafts 4. With the double wing construction illustrated in Figs. 5 to 8, it is desirable to provide bafile means, as indicated at 26 in Figs. 5 and 6 and at 27 in Fig. 7, to prevent the gas from passing back of the other series of collecting elec- The construction and operasaid shafts, the

Mill) be carried forward tion of the apparatus illustrated in Figs. 5

to .8 are similar, except as above noted, to that of the apparatus shown in Figs. 1 to 4.

, collecting electrodes on this outwardswingmg movement to produce a arrmg action.v

. While it is preferred to operate the above described apparatus so as to jar both the collecting and discharge electrodes, it is possible to operate the collecting electrodes by swinging them back and forth through a small angle without striking or closely approaching the discharge electrodes, and in such operation they may be brought suddenly against the stop means described, to jar the electrodes, or the striking action due to lateral movement or vibration of the electrodes may, in some cases, be depended on to remove the collected material therefrom. Stop means may be arranged, as shown at 30 in Fig. 9, so as to arrest the The collecting electrode plate member 3 may be formed of sheet metal or of wire screen material, held in a suitable frame, as indicated at 33 in Fig. 9, and the term plate member, as applied to the collecting electrodes, is to be understood as including such a screen construction.

What I claim is:

1. An apparatus for electrical precipitation of suspended material from gases, comprisin'ga gas receiving chamber adapted for flow of gas therethrough, collecting electrode means mounted in said chamber and :omprising a plurality of pivoted plate members normally extending in planes substantially parallel to each other and to the flow of gas through said chamber, and adapted to swing laterally, and discharge electrodes mounted and insulated in said chamber and extending between said collecting electrode ineans normally parallel thereto.

2. An apparatus for electrical precipitation of suspended material from gases comprising a gas receiving chamber adapted for flow of gas therethrough, a plurality of collecting electrode means extending in said chamber substantially parallel to one another and to the direction of How of the gas through said chamber, each of said collecting electrode means comprising a series of pivoted plates normally extending in the same plane and adapted to swing laterally, so as to extend transversely to the flow of gas through the said chamber and discharge electrodes mounted and insulated in said chamber and extending between said collecting electrode means normally parallel thereto.

3. An apparatus for electrical precipitation of suspended material from gases, comprising a collecting electrode and a discharge electrode, means for pivotally supporting the collecting electrode to permit angular movement thereof against the discharge electrode and means for effecting such angular movement 0 4. An apparatus for electrical precipitation of suspended material from gases, com- -le1-to such verticalplane an prising a collecting electrode having an extended surface, a discharge electrode extending parallel thereto, means for pivotally. supporting the collecting electrode to permit angular movement thereof against the discharge electrode andmeans for effecting such angular movement.

5. An apparatus for electric precipitation of suspended material from gases, comprising a plane collecting electrode, a discharge electrode extending parallel thereto, means for pivotally supporting the collecting electrode to permit angular movement thereof against the discharge electrode and means for effecting such angular movement.

6. An apparatus for electric precipitation of suspended material from gases, comprising a plurality of collecting electrode plates normally disposed in parallel'relation, discharge electrodes between the plates, means for pivotally supporting the plates to permit angular movement thereof against the discharge electrodes and means for efi'ecting such angular movement.

7. An apparatus for electric precipitation of suspended material from gases, including a collecting electrode consisting of a plurality of plates normally disposed substantially in a single plane and forming a substantially continuous surface, means for pivotally sup porting each plate to permit angular movement thereof out of said plane and means for effecting such angular movement.

8. An apparatus for electric precipitation of suspended material fromgases, compris-- ing a collecting electrode consisting of a plurality of plates normally disposed n a single plane and forming a substantially continu- I ous collecting surface, means for pivotally supporting each plate to permit angular movement out of'the plane, means for effectingsuch movement and a discharge electrode disposed parallel to said' plane in the path of movement of at least one of said plates.

9. An apparatus for electric precipitation of suspended material from gases, comprisin a collecting electrode consisting of a plura ity of plates normally disposed in a single plane and forming a substantially con tinuous collecting surface, means for pivotally supporting each plate to permit angular movement out of the plane, means for effecting such 'movement and a discharge. electrode disposed parallel to said plane in the path of movement of all said plates.

10. An apparatus for electrical precipitation of suspended material from gases, comprisinga gas receivin chamber, collecting electrode means in said chamber comprising a plurality of pivoted plate members, normally extending-in the s'arneyerticalplane and adapted to swin 'l charge electrode mem ers.

5 a single plane and forming be struck by the said collecting electrode plate members when swung laterally.

11. In an electric precipitator, a plurality of plates normally disposed in substantially a substantially continuous collecting surface, means for pivotally supporting angular movement thereof out of the plane, and means for efi'ecting such angular move- 10 ment, the plates-being constructed and arranged to contact with one another in their normal position. 4

12. In anelectric precipitator, a plurality of plates normally disposed above each other 1 in a vertical plane and forming a substantially continuous collecting surface, means for pivotally supporting each plate at its upper edge for permitting angular movement out of the said plane and means for effecting such angular movement.

13. In an electric precipitator, a plurallty of plates normally disposed above each each plate for permittingemos other in a vertical plane and forming a substantially continuous collecting surface, means for pivotally supporting each plate at its upper edge for permitting angular movement out of the said plane and means for efl'ecting such angular movement, the plates being constructed and arranged to contact with one another in their normal position.

14:- In an electric precipitator, a plurality of plates normally disposed above each other in a vertical plane and forming a substantially continuous collecting surface, means for pivotally supporting each plate at its upper edge for permitting angular movement out of the plane and means for effecting simultaneous angular movement of all the plates.

In testimony whereof I have hereunto subscribed my name this 29th day of November, 1920.

CHARLES H. WEISKQPF, 

